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Analog Devices Inc./Maxim Integrated MAX903EPA+
- Part No.:
- MAX903EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX903EPA+.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
MAX903EPA+ from Maxim Integrated is a high-speed, low-power quad voltage comparator IC with differential analog inputs and TTL-compatible outputs featuring active internal pull-ups. It delivers 8ns typical propagation delay at 5mV overdrive, consumes 18mW per comparator at +5V, supports ±5V or +5V-to-+10V analog supplies with negative-rail input sensing, and includes independent TTL latch inputs for output hold functionality. It is used in high-speed A/D converters, line receivers, and V/F converters.
For engineers reviewing the MAX903EPA+ datasheet, MAX903EPA+ pinout, MAX903EPA+ application, or MAX903EPA+ equivalent, key selection considerations include its 8ns propagation delay, latch-enabled output retention, dual-supply flexibility (separate analog/digital rails), rail-to-rail input common-mode range including VEE, and compatibility with TTL logic families in fast data-discrimination circuits.
Technical Context
The MAX903EPA+ implements four independent high-gain comparators with fully differential analog inputs referenced to VEE (analog ground/subsystem return) and VCC (positive analog supply), while digital control and output stages are powered by VDD (+5V only). Each channel features dedicated LATCH input enabling synchronous output capture and hold independent of input transitions.
Its architecture supports mixed-signal isolation via separate analog (VCC/VEE) and digital (VDD/GND) supply domains, with input common-mode range extending to VEE −0.1V and output stages optimized for fan-out-of-four TTL loads. Propagation delay is guaranteed ≤15ns over full temperature range (−40°C to +85°C) with 5mV overdrive and 15pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 8ns typical (10–15ns max over temp); enables sampling at >50MHz rates in A/D front-ends. |
| Power Dissipation | 18mW per comparator at +5V; allows dense integration without thermal derating in compact layouts. |
| Analog Supply Range | +5V to +10V (VEE = GND) or ±5V; supports single-supply ground-sensing and split-rail precision thresholding. |
| Input Common-Mode Range | VEE −0.1V to VCC −2.25V; permits direct interface to sensors or signals referenced to negative rails. |
| Output Type | TTL-compatible with active pull-up; drives standard LS-TTL loads without external resistors. |
| Latch Inputs | Four independent TTL-compatible LATCH pins (pins 4, 5, 12, 13); enables synchronized output freeze across all channels. |
| Operating Temperature | −40°C to +85°C; qualified for industrial embedded systems and automotive under-hood auxiliary monitoring. |
Pinout & Package
MAX903EPA+ is housed in an 8-pin plastic DIP package (0.300" wide) with through-hole mounting. Pin 1 is IN−, pin 2 is IN+, pin 3 is GND, pin 4 is LATCH, pin 5 is OUT, pin 6 is VEE, pin 7 is VCC, and pin 8 is VDD. All pins are electrically defined per Maxim's official pin description table; no NC or unused pins are present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− | Negative input terminal for single comparator channel; differential pair with pin 2 defines threshold comparison point. |
| 2 | IN+ | Positive input terminal; voltage difference (IN+ − IN−) determines output state transition timing and accuracy. |
| 3 | GND | Digital ground reference for VDD and latch logic; must be low-inductance connection to minimize noise coupling. |
| 4 | LATCH | TTL-level control input; driven low to freeze current output state, high to enable real-time comparator response. |
| 5 | OUT | TTL-compatible output with active pull-up; sinks up to 8mA, sources 1mA, compatible with LS-TTL fan-out. |
| 6 | VEE | Negative analog supply and substrate tie; sets lower bound of input common-mode range and analog reference. |
| 7 | VCC | Positive analog supply (up to +10V); powers input stage and defines upper input voltage limit (VCC −2.25V). |
| 8 | VDD | +5V-only digital supply for output drivers and latch circuitry; decoupling required separately from VCC. |
Key Features
| Feature | Design Value |
|---|---|
| 8ns typical propagation delay | Enables accurate timing capture in sub-10ns window applications such as high-resolution ADC sampling clocks. |
| Independent TTL latch inputs | Allows per-channel or global output hold without external logic, simplifying synchronization in multi-threshold systems. |
| Rail-inclusive input common-mode range | Supports direct interface to transducers or DACs operating at or below ground potential without level-shifting. |
| Separate analog and digital supplies | Reduces digital switching noise coupling into analog inputs-critical for precision threshold detection in mixed-signal PCBs. |
| 18mW/comparator power consumption | Permits use in thermally constrained modules (e.g., sensor nodes, portable test equipment) without forced cooling. |
Applications
| High-Speed A/D Converters | Line Receivers |
|---|---|
|
Use Scenario: Front-end signal conditioning for flash or pipeline ADCs requiring precise, low-jitter threshold decisions on analog inputs. IC Role / Device Role / Timing Role: Voltage comparator providing sub-10ns decision latency to define sampling instants synchronized with clock edges. Use Value: 8ns propagation delay minimizes aperture uncertainty, directly improving effective resolution in >10MSPS converters. |
Use Scenario: Converting noisy, attenuated differential signals from long cables (e.g., RS-422/485 stubs) into clean digital logic levels. IC Role / Device Role / Timing Role: High-speed threshold detector rejecting common-mode noise while preserving edge integrity for clock/data recovery. Use Value: Input common-mode range including VEE allows direct termination at receiver ground, eliminating offset errors from bias networks. |
| Threshold Detectors | PWM Circuits |
|
Use Scenario: Monitoring multiple analog sensor outputs (e.g., temperature, pressure) against programmable limits in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Quad comparator implementing simultaneous high/low alarm windows using external DAC references. Use Value: Four independent latch inputs allow coordinated freeze of all four outputs upon fault detection, enabling atomic status capture. |
Use Scenario: Generating precise duty-cycle-controlled gate drive signals for motor control or SMPS feedback loops. IC Role / Device Role / Timing Role: Comparing sawtooth/ramp waveform against error-amplifier output to produce PWM edges with minimal jitter. Use Value: 1ns max skew between channels ensures matched rise/fall timing across multiple PWM phases in 3-phase inverters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9203ESA+ | Pin-for-pin compatible, same 8ns delay, but 9mW/comparator (50% lower power); requires +3.3V or +5V digital supply only. | Preferred for new designs where power budget is constrained and legacy TTL loading is not required. | Select MAX9203ESA+ when upgrading from MAX903EPA+ in battery-powered or thermally limited systems. |
| LM339MX/NOPB | Quad comparator with open-collector outputs, 1.3µs typical delay, no latch inputs, wider supply range (2–36V), no separate VDD. | Suitable for general-purpose, non-critical timing applications where speed and latch control are unnecessary. | Choose LM339MX/NOPB only for cost-sensitive, low-speed threshold detection without timing or synchronization requirements. |
Compared with MAX903EPA+, MAX9203ESA+ offers identical speed and pinout with half the power, making it the recommended drop-in replacement; LM339MX/NOPB trades speed and latch capability for broad supply tolerance and lower cost in undemanding applications.
Availability
MAX903EPA+ is available at Aetrix Electronics and suitable for industrial automation, test & measurement instrumentation, and legacy system repair requiring stable component supply with guaranteed traceability and long-term lifecycle support.
Supply support for MAX903EPA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX900–MAX903 family was designed as high-speed, low-power voltage comparators targeting precision timing-critical systems such as A/D converters, V/F converters, and digital line receivers requiring sub-10ns decision latency.
FAQ
What is the maximum operating temperature range for MAX903EPA+?
The MAX903EPA+ is rated for operation from −40°C to +85°C. This extended industrial temperature range ensures reliable performance in demanding environments such as factory-floor controllers, outdoor instrumentation, and automotive body electronics modules where ambient temperatures exceed commercial-grade limits. The MAX903EPA+ maintains specified propagation delay and input offset voltage stability across this full range.
Does MAX903EPA+ support single-supply operation?
Yes, MAX903EPA+ supports true single-supply operation with VEE tied to ground and VCC set between +5V and +10V. Its input common-mode range extends to VEE −0.1V, enabling ground-referenced signal detection without level-shifting circuitry. The TTL outputs remain fully functional with VDD = +5V, and the latch inputs retain valid thresholds under these conditions.
Can MAX903EPA+ be used with ±15V analog supplies?
No, MAX903EPA+ does not support ±15V analog supplies. Its absolute maximum analog supply rating is +12V (VCC to VEE), and the recommended operating range is ±5V or +5V to +10V with VEE = GND. Applying ±15V exceeds the device's absolute maximum ratings and risks permanent damage to the input stage and substrate junctions.
Is there a surface-mount version of MAX903EPA+?
Yes, the surface-mount equivalent is MAX903ESA+, offered in an 8-pin SO package. It shares identical electrical specifications, pinout, and temperature rating (−40°C to +85°C) with MAX903EPA+, differing only in package type (SO vs. PDIP). Both versions are functionally interchangeable in layout-constrained applications where reflow assembly is preferred.
Why does MAX903EPA+ require separate VDD and VCC supplies?
MAX903EPA+ uses separate VDD (digital supply) and VCC (analog supply) to isolate noise-sensitive analog input circuitry from digital switching transients. VDD powers only the TTL output drivers and latch logic, while VCC powers the high-gain comparator core. This separation prevents digital supply ripple from modulating the input offset voltage or causing false triggering-essential for stable operation in mixed-signal systems.
MAX903EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 10V, ±2.5V ~ 5V
- :
- 4mV @ ±5V
- Voltage - Input Offset (Max):
- 10µA @ ±5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 4mA, 3mA, 1.5mA
- Current - Quiescent (Max):
- 82.5dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
MAX903EPA+ FAQ
1.How can I place an order for MAX903EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX903EPA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX903EPA+ reliable?
The price and inventory of MAX903EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX903EPA+ is usually 5 days.
3.What payment methods are accepted for MAX903EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX903EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX903EPA+?
MAX903EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX903EPA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX903EPA+?
For technical support, including MAX903EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX903EPA+ requirements.
6.How does Aetrix verify that MAX903EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX903EPA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX903EPA+ meets industry standards.
7.What is the process for return or replacement of MAX903EPA+?
All MAX903EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX903EPA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX903EPA+ part is unused and in its original packaging.
Return procedure for MAX903EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX903EPA+ Tags
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LM339DR
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LM393DR
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LM239DR
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LM2903P
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NCX2200GMAZ
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